Game concept · All Under Heaven
Military Career Path
The game also links it as Military Career, Military.
From the game's encyclopedia
Rulers who pursue a Military Career Path focus on martial skills over administrative tasks. They are appointed to Military Circuits and their Merit will grow based on their ability to recruit and maintain Title Men-at-Arms.
The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.
Military Career Path is an entry of Crusader Kings III's in-game encyclopedia (All Under Heaven). The game explains it: "Rulers who pursue a Military Career Path focus on martial skills over administrative tasks." The game also links it as Military Career and Military. Patch 1.20.1.2, from game/common/game_concepts/tgp_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/tgp_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.